Filming for Transformers 4 has begun in Chicago. The city will represent China in the film. Also, michaelbay.com has released the first official photo from filming. It includes Bay himself, Mark Wahlberg and Jack Reynor among some crew members. The interesting thing is the giant pyramid-like object. What could that possibly be? The last piece of news for today is a rumor stemming from a tip received by SuperHeroHype. Supposedly, scenes that were shot today involved Dinobots, but of course there is no way to confirm that. For more images from today's shoot, click here.